🛡️ CVE-2025-14819 — curl

🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-295 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

When doing TLS related transfers with reused easy or multi handles and

altering the CURLSSLOPT_NO_PARTIALCHAIN option, libcurl could accidentally

reuse a CA store cached in memory for which the partial chain option was

reversed. Contrary to the user's wishes and expectations. This could make

libcurl find and accept a trust chain that it otherwise would not.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2025-14819 is classified as CWE-295: Improper Certificate Validation. A TLS certificate is accepted without proper verification, so a man-in-the-middle can present their own.

Affected software

CVE-2025-14819 is recorded against 1 package.

  • curl (from 7.87.0 up to 8.18.0)

Timeline and source

Published on 8 January 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

curl.se
curl.se
www.openwall.com

CVE-2025-14819 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE CWE-295
Public Exploit ✅ No
Source NVD
Published 2026-01-08
Updated 2026-08-11
Modified 2026-06-17

Affected Packages

Software From version Fixed in
curl 7.87.0 8.18.0

References

Mitigation, Patch, Vendor Advisory https://curl.se/docs/CVE-2025-14819.html
Mailing List, Mitigation, Patch, Third Party Advisory http://www.openwall.com/lists/oss-security/2026/01/07/5

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